Someone, usually a male, who never makes it clear how they really feel. They'll tell you things, but will never tell you the full situation. A Greyferd is the kind of person to date you, tell you he loves you, break up with you saying "he can't be in a relationship right now", and then continue flirting with you, call you baby, and ask for you back. Some may call him a douche-bag but in reality, he is a very nice loving person with a great sense of humor and amazing taste in music. He is also very sexy but doesn't believe in himself, and has some serious issues, making people believe he is a douche bag.
I can't get that stupid Greyferd out of my head. Rrrrg!